@inproceedings{ijcai1977p56,
  title     = {NUDGE, A Knowledge-Based Scheduling Program},
  author    = {Goldstein, Ira P. and Roberts, R. B.},
  booktitle = {Proceedings of the Fifth International Joint Conference on
               Artificial Intelligence, {IJCAI-77}},
  publisher = {International Joint Conferences on Artificial Intelligence},
  editor    = {Raj Reddy},
  pages     = {257--262},
  year      = {1977},
  note      = {Representation of Knowledge},
  url       = {https://ijcai.org/proceedings/1977/56},
}